I am just trying to get the whole biab thing sorted out. man, this is one kind of a program! looks like you can spend ages with it and only sratch just a bit of it.

same here ,I got 2013 last summer and haven't had time to play with it,,,I wish groove 3 had a video for it

I am more about writing songs than producing them I suppose, I play guitar and sing, but I have songs that need strings and piano and I struggle with trying to create those parts, so I'm hoping BiaB will help me get all of the music out of my head and into a digital file.  To be able to give BiaB a chord progression and a song structure, and then let it construct the instrument parts you specifiy...what?  No way!  Way!  I'm excited.  C'mon Santa!  Let the learning begin....   

I am really considering getting it. I have done some research in the net and some people complain about the following:
 
1. loading time, espciallly with realtracks, take forever (in the vid they are loaded immediately)
 
2. sometimes random music appears without being "invited", and cannot be deleted
 
3. the GUI and the manual are extreme user-unfriendly and lead to frustration.
 
is this true, or is this just the usual internet rants? thanks!  

I have been using BiaB for a number of years now so here is my take on your questions:
 
1-this is totally dependent on your system specs, ie on my system realtracks load very fast.
 
2-I have never seen this. There can be some added notes to a chord as many players do this intentionally. For instance you put in a 7^th chord you may get a 9^th or 13^th depending on the style you have chose. This is especially true for jazz styles. There is a flag to either jazz up or jazz down chords but sometimes this still happens. In MIDI this is not a problem as you just edit out or in whatever you want. If you have Melodyne Editor you should be able to do this with realtracks also.
 
3-this is true. I haven’t see the 2014 version but from what I have read on the forum this is still true for the GUI. Fortunately the PGMusic forum members are extremely nice and will amswer any questions you have.
 
I will add that music reading musician or one with some chord knowledge can get started in BiaB very rapidly. In fact you can start making music with it without reading the manual. The problem comes in when you get deeper into the program. The terminology and placement and execution of many functions are not logically placed IMO. However once you get that down things fall more rapidly in place.
 
I hope this helps.
 
-edited for typos-

Thanks for your information Mario. I think I will give it a shot!